Dish-washer nozzle assembly



1964 P. DANNENMANN EI'AL 3,116,381

DISH-WASHER NOZZLE ASSEMBLY Filed April 16, 1962 Inventors Paul Dannenmcmn Kluudius Poizelf United States Patent 3,116,881 DESH-WAfiHER NGZZLE ASSENLELY Paul Dannenmann and Klaudius Patzelt, Weizheim, Germany, assignors to G. Baulrnecht (Sandal-1., Stuttgart,

Germany, a corporation of Germany Filed Apr. 16, 1962, Ser. No. 187,620 Claims priority, application Germany Dec. 1, 1961 9 Claims. (Ql. 239 552) The present invention relates to improvements in nozzle sets for dish-washing machines.

In known nozzle sets for dish-washing machines, the nozzles supplying and distributing the washing liquid are arranged in the form of apertures in members which are removable from the nozzle-holder. This removability is necessary to enable the nozzles to be cleaned. In dish-washing machines with a circulating washing liquid particularly, the nozzles are apt to become choked. With known removable nozzle sets, however, it is difficult to get the comparatively small bores or narrow through slots that form the nozzles completely clean. In some cases it is even necessary to clean the nozzle apertures individually. This is disagreeable, and, above all, time consuming.

The present invention obviates these disadvantages by providing, as a nozzle-holder, a tube which is slotted longitudinally in the region of the nozzles, and in which is removably arranged an insert which fills the tube slot by bearing on the surfaces that form the boundaries thereof, and which has transverse recesses or grooves extending outwards from the interior of the tube. These recesses cooperate with the tube slot side-walls to form the nozzles.

The result is that the nozzle openings are formed not by individual bores but by the cooperation of the grooves of the insert with the surfaces bounding the slot. The insert may be cleaned without ditficulty when removed from the nozzle-holder, by simple washing or the like, as it has no apertures or bores which must be cleaned individually.

The grooves or recesses in the inserted member forming the nozzles may be arranged either parallel to one another or in different directions so that the jets issuing from them impinge from different directions upon the crockery to be washed, whereby a satisfactory cleaning of the crockery is ensured.

The insert may advantageously be made of synthetic material, so that it does not need any sort of surface protection.

The tubular nozzle-holder normally serves for supplying the washing fluid to be delivered by the nozzles, or also drying air. For the purpose of securing the insert in the slot of the tubular nozzle-holder, the insert may be provided at one end, or even at each end, with a resilient projection, extending longitudinally beyond the slot, and capable of being brought into engagement with the slotted tube. The inserted member can be removed from the slot by resiliently pressing inwards these projecting lugs.

Nozzle sets according to the invention may be employed with a great variety of dish-washing machines or the like. Thus for example they can be adopted in dishwashing machines with a revolving crockery-holder and stationary nozzles, just as in those with a stationary crockery-holder and revolving nozzles. An example of one such machine is shown in one of the co-inventors copending United States patent application Serial No. 187,704, filed Apr. 16, 1962, entitled Dish-Washer, based on our corresponding German application No. B 64 778 10/ 34c filed November 14, 1961 by the assignee hereof.

One constructional example of the invention is illustrated in the accompanying drawings, in which:

3,ll5,88l Patented Jan. 7, 1984 FIGURE 1 shows a side view of a nozzle set according to the invention, with the nozzle-holder in section;

FIGURE 2 shows the same nozzle set, as seen when looking in the direction towards the nozzles; and

In FIGURE 3 the nozzle set is represented in crosssection along the line 3-3 of FIGURE 1, as seen when looking in the longitudinal direction of the nozzle-holder.

In particular, in the drawing, 1 denotes the tubular nozzle-holder, in the longitudinal slot 2 of which is arranged a bar-shaped insert 3. Insert 3 has a snug fit within slot 2 and bears against the boundary surfaces of the slot 2 with a light press fit to minimize fluid leakage therebetween. This insert 3 is provided on each side with transverse groove-like recesses 4, which, in conjunction with the boundary surfaces of the slot 2, form the nozzle apertures as is most clearly shown in FIGURE 2. At the lower end of FIGURE 1, the insert 3 has a projection 5, which extends, within the interior of the nozzle-holder 1, beyond the end of slot 2. At the opposite end of the insert 3 is arranged a resilient projection 6, which likewise projects lengthwise beyond the end slot 2. By pressing upon the lug 7, the resilient projection 6 is pressed so far inwards that it comes out of engagement with the end of slot 2 in the holder 1 so that the insert 3 can be taken out of the slot 2. In the preferred form of insert 3, the width of insert 3 and the length of grooves 4 are sufliciently large to definitely direct the issuing fluid jets longitudinally of the grooves In this manner the directions of the jets may be set at various angles by varying the direction of the grooves 4- as required.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed and desired to be secured by Letters Patent is:

1. In a dish-washer, a nozzle assembly comprising a tubular fluid conduit having an elongated longitudinally extending rectangular aperture formed in a side wall thereof and delimited by opposed spaced apart longitudinally extending side edges, a one-piece nozzle insert having a generally rectangularly shaped cross-section and matingly extending through said aperture with portions of said insert being disposed interiorly and exteriorly of said conduit, said insert having outwardly opening side grooves facing said side edges and extending transversely of said aperture in fluid communication with the interior of said conduit, said grooves cooperating with said side edges to define nozzle openings establishing fluid communication between the interior and exterior of said conduit, said insert having means adjacent one end thereof cooperating with an edge of said aperture extending between said side edges to detachably secure said insert to said conduit.

2. The nozzle assembly defined in claim 1 wherein said means detachably securing said insert to said conduit comprises projections extending longitudinally of said conduit beyond the ends of said aperture internally of said conduit and interlocking with the walls of said conduit.

3. The nozzle assembly defined in claim 2 wherein at least one of said projections is resiliently supported upon said insert for movement longitudinally of said aperture to permit disengagement thereof from said aperture.

4. The nozzle assembly defined in claim 1 wherein the width of said insert in a plane transverse to the grooves thereon is substantially less than the maximum internal cross-section of said conduit transversely of said grooves.

5. The nozzle assembly defined in claim 1 wherein the Width of said insert internally of said conduit in a plane parallel to the longitudinal direction of grooves is substantially equal to the internal Width of said conduit in said plane.

6. The nozzle assembly defined in claim 1 wherein said grooves are rectilinear.

7. The nozzle assembly defined in claim 1 wherein at least certain of said grooves extend perpendicular to the plane of said aperture.

8. The nozzle assembly defined in claim 1 wherein at least certain of said grooves are inclined relative to the plane of said aperture.

9. The nozzle assembly defined in claim 1 wherein the 4 material of which said insert is formed is a synthetic plastic.

References liter in the file of this patent UNITED STATES PATENTS 1,758,628 Thurm et al. May 13, 1930 2,218,827 Mott et a1. Oct. 22, 1940 2,585,608 Wieghart Feb. 12, 1952 2,774,630 Henry et al. Dec. 18, 1956 2,811,392 Warp Oct. 29, 1957 2,976,794 Allander et a1 Mar. 28, 1961 2,985,384 Martin May 23, 1961 FOREIGN PATENTS 153,327 Sweden Feb. 7, 1956 735,560 Great Britain Aug. 24, 1955 

1. IN A DISH-WASHER, A NOZZLE ASSEMBLY COMPRISING A TUBULAR FLUID CONDUIT HAVING AN ELONGATED LONGITUDINALLY EXTENDING RECTANGULAR APERTURE FORMED IN A SIDE WALL THEREOF AND DELIMITED BY OPPOSED SPACED APART LONGITUDINALLY EXTENDING SIDE EDGES, A ONE-PIECE NOZZLE INSERT HAVING A GENERALLY RECTANGULARLY SHAPED CROSS-SECTION AND MATINGLY EXTENDING THROUGH SAID APERTURE WITH PORTIONS OF SAID INSERT BEING DISPOSED INTERIORLY AND EXTERIORLY OF SAID CONDUIT, SAID INSERT HAVING OUTWARDLY OPENING SIDE GROOVES FACING SAID SIDE EDGES AND EXTENDING TRANSVERSELY OF SAID APERTURE IN FLUID COMMUNICATION WITH THE INTERIOR OF SAID CONDUIT, SAID GROOVES COOPERATING WITH SAID SIDE EDGES TO DEFINE NOZZLE OPENINGS ESTABLISHING FLUID COMMUNICATION BETWEEN THE INTERIOR AND EXTERIOR OF SAID CONDUIT, SAID INSERT HAVING MEANS ADJACENT ONE END THEREOF COOPERATING WITH AN EDGE OF SAID APERTURE EXTENDING BE- 